H. R. Mis. Doc. No. 21 1 .—Exploration Alaskan Salmon Rivers. 



Plate II 



/#- 



FIG. 4. THE HUMPBACK SALMON (Oncorhynchm gorbuscha). Sea-run. (See page 31.) 



FIG. 5. THE HUMPBACK SALMON {.Oncorhynchus gorbusclid). Breeding male. (See page 31.; 



